Fix 64 bit compile errors flagged by conversions from size_t to uint32.

webkit/plugins/npapi/plugin_host.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/plugins/npapi/plugin_host.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 464 matching lines @@
 
     base::PlatformFileInfo post_file_info;
     if (!file_util::GetFileInfo(file_path, &post_file_info) ||
         post_file_info.is_directory)
       return NPERR_FILE_NOT_FOUND;
 
     if (!file_util::ReadFileToString(file_path, &post_file_contents))
       return NPERR_FILE_NOT_FOUND;
 
     buf = post_file_contents.c_str();
-    len = post_file_contents.size();
+    len = static_cast<uint32_t>(post_file_contents.size());
   }
 
   // The post data sent by a plugin contains both headers
   // and post data.  Example:
   //      Content-type: text/html
   //      Content-length: 200
   //
   //      <200 bytes of content here>
   //
   // Unfortunately, our stream needs these broken apart,
@@ skipping 485 matching lines @@
       GURL cookies_url((std::string(url)));
       result = webplugin->GetCookies(cookies_url, cookies_url);
       break;
     }
     default:
       return NPERR_GENERIC_ERROR;
   }
 
   // Allocate this using the NPAPI allocator. The plugin will call
   // NPN_Free to free this.
-  *value = static_cast<char*>(NPN_MemAlloc(result.length() + 1));
+  *value = static_cast<char*>(
+      NPN_MemAlloc(static_cast<uint32_t>(result.length()) + 1));
   base::strlcpy(*value, result.c_str(), result.length() + 1);
-  *len = result.length();
+  *len = static_cast<uint32_t>(result.length());
 
   return NPERR_NO_ERROR;
 }
 
 NPError NPN_SetValueForURL(NPP id,
                            NPNURLVariable variable,
                            const char* url,
                            const char* value,
                            uint32_t len) {
   if (!id)
@@ skipping 101 matching lines @@
 }
 
 void NPN_URLRedirectResponse(NPP instance, void* notify_data, NPBool allow) {
   scoped_refptr<PluginInstance> plugin(FindInstance(instance));
   if (plugin) {
     plugin->URLRedirectResponse(!!allow, notify_data);
   }
 }
 
 }  // extern "C"